Dust grains fall from Saturn’s D-ring into its equatorial upper atmosphere. - Mitchell, D. G.; Perry, M. E.; Hamilton, D. C.; Westlake, J. H.; Kollmann, P.; Smith, H. T.; Carbary, J. F.; Waite, J. H. Jr.; Perryman, R.; Hsu, H.-W.; Wahlund, J.-E.; Morooka, M. W.; et al. (Science (pre-March 2025), 2018)